Furnace-wall air plate



March 1 1927.

|. YIAYLOR FURNACE WALL AI R PLATE Filed Nov.

INVENTOR. If? THJLOR j V- M i ATTORNEYJ \f w Q\ MN N 0N LN o Patented Mar. 1, 192 7.

UNITED STATES A 1,619,445 PATENT OFFICE.

mvme a. non, or woncnsrnn, mssaonusnrrs, Assmnon To s. RILEY s'roxna conromrron, or woncnsrnn, massacnusnr'rs, a GORPORATiON or MASSA- cmrsnr'rs.

summon-warn AIR PLATE.

Application filed November 6. 1923; Serial No. 673,162.

This invention relates to furnaces having an automatic feed by which the fuel is moved rearward or laterally during combustion, so that the ash and refuse accumulates against a rear or side wall of the furnace. This ash and refuse usually contains a certain amount of combustible material which should be fully consumed to maintainthe efiiciency ofthe pr ovision in afurnace wall of a pluralityof air-- admitting blocks or plates so constructed that they may be "separately placed in-position or removed therefrom with a minimum expenditure of time andlabor.

My. invention further relates proved arrangementfor supplying air to such plates by both forced and natural draft Y so that the plates'may be kept cool under all operating conditions. y

I have shown my invention asembodied in a furnace in which the coal is moved rearward toward the bridge wall, at which point the ash and refuse is supported upon dumping platesof the type shown in the prior be hereinafter described and more particularlypointed out in the appended claims.

A preferred forin of the invention is -flange's 23 form vertically extended an dis- Fig. 1 is a front elevation of several of my shown in the drawings in whichproved furnace wall plates in podtion inthebridgewallofafurnace; F" 2 is a sectional plan view taken along the line 2-.2 in E' 1, with certain of the plates shown in plan view;

Fig. 3 is a reduced sectional elevation,

taken 9.10 the line 3--3 in Fig. 1 andshowing also a 7 relative position of the as s rp t g p P t and 'Fig. .4 1s a perspective view of one of the air admitting plates.

to im im patent to Riley No, 1,322822, issued Nov..

indicated a furnace rear or'bridge wall 10,

a portion of a side wall 11, and dumping plates 12 of the general type disclosed in the prior patent to Riley above identified. These plates 12 are connected for oscillating motion with the-side walls of the stoker. retorts and are supported upon rolls 13 car-' ried by rack bars 14 which may be withdrawn or moved forward to permit. dumping of the ash and refuse supported on the plates 12. For a detailed description of the construction of these dumpingplates, to-

gether with the other usual parts of the underfeed furnace to which they pertain,

reference is again made to the patent to Riley No. 1,322,822.

The wall 10 is formed with a, recessed portion 15 in which a channel iron or beam casting -16 extends across the rear of the furnace. Thischannel iron or beam- 16 is built into thewall 10 and forms a permanent part. of the structure thereof. The beam lfi-is-provided with anvupwardly extending rib or flange 17 and a corresponding depending rib or flange 18,'the ribs 17 and 18 extending from'end toend of the beam 16.

* Air plates 20 are provided, having upper and lower grooves or recesses 21' and 22 adapted to receive the flanges 17 and 18. The groove 21 is dee enough so that the block may bepushed upward to pass over the. rib 17 ,after which the block is dropped into place and the ribs 17 and 18 prevent accidental movement thereof.

When' it is desired to remove a plate 20, it is merely necessar to raise the plate and swing the lower en outward or forward,

thus reversing the operation of inserting the 7 late. Each plate 20 is provided with a orwardly extending flange 23 and with air passages 24 formed in the side thereof. The

charge openings between the plates and engagiland laterally support'the refuse.

angle iron 25 may be secured to the 16 by bolts 26 and engagesjtheback side of the plates 20, thus supporting the plates and preventing rearward movement thereof. This angle iron divides the space behind the plates 20 into upper and lower air passages 27 and 28. When thus divided.

' it is desirable to connect the lower air passage 28 by a pipe 30 (Fig. 1 to a'blower (not shown) or other convenient supplyfof Referring particularly to Fig. 3, If have air-under pressurc,so that-air maybe forced thereto, a plurality of air-admitting removablymounted in said recess-an outward through the air passages 24 between the plates 20 to complete the combustion in the ash and refuse on the dumping plates 12.

The upper air passage 27 may be open to atmosphere in the boiler room at one end, as indicated in dotted lines at 31 in Fig. 1, and may be connected by a pipe 32 at the opposite end to the furnace stack (not shown). A current of air will thus be 'wall plates provide a very rigid and durali-ile structure to crush the refuse.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims, but what Iclaim is 1. In a furnace, in combination, a furnace wall having a recess, an ashsupport adjacent thereto, members forming upper and lower ribs in said recess, and a plurality of air admitting plates mounted at the front or said. recess and having end grooves to receive said ribs, the upper grooves being deep enough to permit lifting said plates to clear the lower ribs for removal from said furnace.

2. In a furnace, in combination, a furnace wall having a recess, members forming upper and lower ribs'in said recess, an ash supportadjacent said recess, a plurality of airadmitting plates rcmovably mounted in said recess and having end grooves to receive said ribs, and means to supply air under pressure through said plates'to the refuse on said ash support, said plates eachhaving a relatively thin vertically extending flange projecting forward from the main rtion of said fuel an spaced apart throughout I their cent lates.

3. a furnace, in combination, a furnace wall having a recess, an ash support adjacent plates spaced from the rear wall ofsaid recess to form an enclosed air space therewith, said plates having air openmgs therethrough from a portion of said enclosed air space, and a'member dividing said enclosedair space into (plate and laterally supporting the passages receiving air under pressure and deliverlng the same through said a1r openings to support combustionon said ash supupper and'lower air passages, one of said forming a member against which clinkers may be crushed.

5. A bridge wall plate for forming a protectiv'e portion of a furnace bridge wall comprising a long, narrow and deep bar having front and rear flanges arranged to co-operate with like parts of other plates to form two substantially continuous spaced walls having van air passage therebetween, an opening through the rear flange to the air passage and a tuyere opening through ,the front flange to feed air to the fire, the flow of air being substantially limited by the size of the opening in the rear flange, whereby if .the front flange portions of a series of bars are burned through, the amount of air admitted to the lire is not n'iaterially increased.

6. A bridge wall plate comprising a bar having its ends shaped to form supporting hooks and having two lateral flanges, one

flange forming the rear face and having an air opening therethrough, and the other flange liavmg a tuyere opening out of alignment with said air opening, the space between the flanges forming an air passage connecting the air 0 ening and the tuyere opening when the plhtc is assembled with like plates to form a wall.

7. A furnace comprising a bridge wall, a Stoker having a dump plate separated from the bridge wall to form an ash pit, and to support ashes in the bottom of the pit, said parts-being so arranged that ashes may contact with the bridge wall opposite the dump plate, a series of wall plates each separately removably mounted on the bridge wall, 0pposed to the dump late and constructed to withstand the crus ing of clinkers there against, each wall plate having top and bottom hooks on its" rear portion and a tuyerc opening in front, co-operating parts on the wall to hold the plate removably in 'tion, and means forming an air passage,

1n the rear of the wall plates for circulating air in the rear of the plates and through' said tuyere openings.

In testimony whereof I, have hereunto aflixed my signature. v

IRVING A. TAYLOR. 

